73899648 has 64 divisors (see below), whose sum is σ = 218116800. Its totient is φ = 24632064.

The previous prime is 73899647. The next prime is 73899653. The reversal of 73899648 is 84699837.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×73899648² = 10922315949047808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 73899594 and 73899603.

It is not an unprimeable number, because it can be changed into a prime (73899643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7236 + ... + 14147.

It is an arithmetic number, because the mean of its divisors is an integer number (3408075).

Almost surely, 2^73899648 is an apocalyptic number.

It is an amenable number.

73899648 is an abundant number, since it is smaller than the sum of its proper divisors (144217152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73899648 is a wasteful number, since it uses less digits than its factorization.

73899648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21406 (or 21388 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 73899648 is about 8596.4904466881. The cubic root of 73899648 is about 419.6437795919.

It can be divided in two parts, 73899 and 648, that added together give a palindrome (74547).

The spelling of 73899648 in words is "seventy-three million, eight hundred ninety-nine thousand, six hundred forty-eight".